Chain-link.



J. M. DODGE CHAIN LINK.

Arrmouxon funn rn. 15, nos.

Pamna oct.25,191o.

UNITED STATES vPATENT OFFICE.

JAMES M. DODGE, F PHILADELPHIA, PENNSYLVANIA, ASSIG-NOR T0 LINK-BELT COMPANY, OF CHICAGO, ILLINOIS, A CORPCBATION OF ILLINOIS.

CHAIN-nime Specioation of Letters Patent.

Patented Oct. 25, 1910.

Application illed February 15, 1809. Serial N0. 417,837.

To all whom 'it may concern:

Be it known that I, JAMES M. DonGE,ra

certain which the ollowing is a specification.

My invention relates to that class of detachable chain links having a bar at one end and a hook at the op osite end adapted to engage a bar of an adijoining link; the link belng open at the center to receive the teeth of the sprocket wheel.

'The object of my invention is to readily and accurately manufacture such a link of wrought metal, so that the body portion can be made of a rod bent into proper shape,

4and the hook member can be made by shaping and pressing a blank, the two parts being welded together .preferably by the elec- 'tr1c welding process.

In the accompanying drawing: Figure 1, isa plan View of my improved chain link; Fig. 2, is a side view; Fig. 3, is 'a longitudina sectional view on the line 3 3, Fig. 1;

Fig.' 4, isv an end view; Fig.- 5, is a transverse sectional view on the line 5 5, Fig. 1; Fig. 6, is a perspective view of the bent rod forming the body portion of the link; Fig. 7, is a perspective view of the socket member; Fig. 8, is a view of the blank from which the hook member is made; Figs. 9 and 10, are

views of the hook member having welding rojections; Fig. 11, is a view showing a ink made of a round rod or wire; Fig. 12, is a sectional view on the line 12-12, Fi 11; Fig. 13, is a view showing the link ma e of a round bar having the hooked ends 'lattened, and Fig. 14, is a sectional view of a link made of a round rod having the ends of the hook flattened.

A is the body of the link having side bars a a, an end bar a and a h ooked portion A. This is commonly known as the Ewart link. One of the side bars is preferably reduced at a2 so that by a lateral movement one link can be readily detached from or coupled` to another link.

Usually links of this type have been made of malleable iron, but I have found that a much more substantial link canV be m rovements in Chain-Links, of-

rodare bentso as to formv hooks bl Z2 which aline with the socket member D. This memyber is mounted between the two hooked ends of the rod, as shown in Fig. 1, and welded thereto by electric weldin or by any other suitable process. The we ding may extend the full length of the contacting portions of the member D, or the member D may be made as Shown in Figs; 9 and 10, with projections d which abut against the inner surface of the hooked ends b b, so that the two parts can be welded together by what is known as spot weldin A portion d2 of the so et member is at the back ofA4 the nsocket and projects slightly above the side bars ofthe link in the present instance, and reduces the slot in the socket member so as to prevent the laccidental displacement of the cross bar of the adjoining link. By this arran ement a'sharp bend in the side bar is avoi ed, producing a much stronger link.

The portion d2 of the socket member has lateral extensions d bearing' against the shoulders c formed by bending the side bars a a, so as to form the hook, as the hooked portion is less in width than the body of the link to ena-ble it to engage the end bar of an adjoining link. ,These extended portions of the member lD increase the bearmg-.surface for the sprocket which projects through the opening in the link.

In the main figures of the drawing the rod from which the link is made is rectangular in cross section. In Figs. 11 and 12 I have shown the body portion of the link made from a round rod or wire, and I referably in this instance, so shape the en walls of the block D as to conform somewhat to the rounded surface of the hooked portions of the side bars. The ends of the hooked portion may be flattened as in Fig. 14, if

\ lateral extensions and first bent into approximate form and thmoompro'esed in :suiti able dies into iinal'shgpe, so as to produce a suitable bearing for the cross bar of an adjoining link, and at the same time forni an increased bearing surface for the sprocket, as illustrated in Figs. 9 `sind 10. In this process of forming the socket member I may form the projections at the ends f the socket member, as shown in Figs. 9 and 10, without Ihiding materially; to the @est when it is de-' aired to use the spot welding process.

I dojnot claim roadly in this appliestion the formin ofi l on the ends of theside members o the 1in mounting n socket e bar to aline with the looped :portions .sind

wenn the parte together; this forms the .etiject of a separate Vpplication for patent filed b' me on March 12th, 1908, under Serial o. 420,548.

1.V The `eombintttion in im open rectanguhir chainlink, of yside bers; 'each havin a. hook et one; end and euch being` proviA ed l with e laterally extending shoulder adjacent its hook; I'with a socket member mount edv Ween: the hooks and having extensions resting 'agiiinst the shoulders.

its

2, 'An-open rect'sn 1er chain linkhsving enfendiber'and side rsiesoh side bar havingia hook et one end and 's laterally extendng shoulder backA of the hook; the side bars-'attire hooks being closerthsn at the befr; ai socket membenfseeured to the side bers and -niounted between the hooks; the rear portion of said member havin latrel extensions bearing against the s oulers.v

3. The oombinatitniin open reetengw lar chsin link,- of e cross bnr of oireulsr seetion and rectangular side bers; each side bar having ai hook at'oneend ond beingprovided with a laterally' extending shoulder directly back of the hook; the hooked of the side bars bein closer together than the other ends thereo with a socket -member mounted between the hooked ends of the side bars and having lateral extensions resting against the shoulders; said "socket member being secured to said side bars.

4. The combination in an open rectangular chain link of an end bar; two side bars each having a hook at one end and connected to the end bar; with a hooked socket member mounted between the hooks (yf-fthe side bar; the internal surfaces of the hooks of the sooketmember and of the side'bers alining with each other.

5. .The combination in s chain link of two side bars; means for connecting seid bars, the ends of the side bars being hooked; with s hookedv socket member mounted between said 'side bars and provided with a lateral extension engaging the saine; the hooks of the socket member and side bars being 'in line with each other end forming a substantially continuons wi'king'surfce.

6. The combination in o chain link, of n qusdrangulsr body portion made of'wire bent into shape and also bent'to form shoulders and a hook member,- ond a socket tion adapted to rest between the sfidesiofA I the hook nierntwn*v and having lateral exten- 'Y sions' 'resting against the shoulders et `the' junction of the hook member 'sind vthe body of the link.

In testimony whereof, I have signed my 

